Kelly was a well-known business person as co-owner of Burr & Co. Insurance Agency.

"It's frustrating we can't produce the answers we'd like to produce," said Ottawa County sheriff's Lt. Mark Bennett, one of the investigators who looked at the case with Grand Rapids police detectives.

"It certainly is a case we're searching for some new information on," he said on Tuesday, Dec. 4.

Ottawa sheriff's detectives became involved in the case when Kelly's body turned up in March 2008 in a wooded area near 160th Avenue and Pierce Street, south of Grand Haven.

After Kelly disappeared on Dec. 4, 2007, police found her purse and wallet at a Burton Street SE car wash a day later.

Then the following day, her 2006 Acura was found on Plymouth Avenue SE, not far from Ottawa Hills High School.

The next development came when a surveyor found the body.

Bennett said no one can claim a lack of effort by police in the case. Detectives compiled four huge binders of reports and documents in the investigation.

"We've interviewed dozens of people and talked to hundreds, executed numerous search warrants, looked at phone records and utility bills and searched home and other venues," he said.

"But at this point, there's a lack of clear direction as to a suspect," Bennett said.

Silent Observer offered a $50,000 reward in the case that, according to the organization's website, is still valid today.

Bennett said the case has never been closed, but "our lines of communication have been pretty dry."

He said one piece of pertinent information from the public, as in many cases, could provide the right clue to help solve the case.

"We certainly want to try to get some answers for her family," he said.